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Segment Information - Summary Revenue from External Customers by Country (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of geographical areas [line items] |  |  |
Revenue | ₩ 500,845 | ₩ 725,516 | ₩ 463,618
Korea |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 53,142 | 86,058 | 46,719
Taiwan |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 114,410 | 176,071 | 175,664
Japan |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 18,857 | 18,999 | 26,133
The United States of America |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 34,653 | 22,702 | 33,697
Thailand |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 61,781 | 136,874 | 75,498
The Philippines |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 58,927 | 102,595 | 26,003
Indonesia |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 32,373 | 58,763 | 5,472
Hong Kong |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 17,255 | 22,656 | 24,397
Malaysia |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 26,361 | 58,553 | 24,830
Brazil |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | 26,434 | 5,264 | 6,444
Others |  |  |
Disclosure of geographical areas [line items] |  |  |
Revenue | ₩ 56,652 | ₩ 36,981 | ₩ 18,761

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 114 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_114&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2024-01-01 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_113_a&doctype=Standard -URIDate 2024-03-27 + Details
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